CN102285601B - Rotary buffer with limit switch for platform crane - Google Patents
Rotary buffer with limit switch for platform crane Download PDFInfo
- Publication number
- CN102285601B CN102285601B CN2011102237395A CN201110223739A CN102285601B CN 102285601 B CN102285601 B CN 102285601B CN 2011102237395 A CN2011102237395 A CN 2011102237395A CN 201110223739 A CN201110223739 A CN 201110223739A CN 102285601 B CN102285601 B CN 102285601B
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- Prior art keywords
- energy disperser
- buffer
- limit switch
- push rod
- hinged
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Abstract
The invention discloses a rotary buffer with a limit switch for a platform crane. The rotary buffer comprises an assembly lug plate 1 and an assembly lug plate 2 which are arranged on a gantry, wherein a limiting plate is arranged on the lower edge of the assembly lug plate 1; the limit switch is arranged in the limiting plate; the assembly lug plate 1 is hinged with the buffer; a pressure spring and a guide sleeve are arranged inside the buffer; the port of the guide sleeve of the buffer is provided with a buffer ejector rob; the outer end of the buffer ejector rob is connected with the pressure head of the buffer ejector rob; a limiting edge is formed on the lower surface of the buffer close to a pin shaft and is provided with a pressing plate; a buffer fulcrum pressing plate is arranged on an arm support corresponding to the pressure head of the buffer ejector rob; the assembly lug plate 2 is hinged with a repositor; a pressure spring 2 is arranged inside a guide sleeve 2; pressing rods are arranged at both ports of the guide sleeve 2; and the outer ends of the pressing rods are hinged with the buffer. The rotary buffer has a simple structure, and the operability, the accuracy and the safety of the rotary buffer meet technical requirements.
Description
Technical field
The invention belongs to the offshore rig technical field, relate to a kind of rotary buffer with limit switch for platform crane.
Background technology
Marine platform crane is used span winch (or oil cylinder) luffing, when jib reaches the maximum angle of design limiting, an energy disperser is installed between jib and door frame, to prevent jib, rotates excessively backward.Energy disperser commonly used is arranged on door frame and can not rotates, when jib rotates to the maximum angle allowed, after energy disperser push rod contact jib, push rod does not rotate along with jib, and the push rod pressure head of energy disperser can produce slippage or energy disperser distortion itself to eliminate the motionless and displacement of generation of contact point with the jib contact point in the jib rotary course.Because energy disperser can not be along with rotation, so the energy disperser push rod is bearing larger downforce when retracting.Under this state, the push rod retraction is mobile causes wearing and tearing larger between push rod and guiding, thereby damages or reduce the life-span of energy disperser, affects the function of energy disperser.In addition, there is no the mounting limit switch in traditional energy disperser, the limit switch of Platform lifting devices itself is arranged on the root of jib, and the triggering of limit switch needs other a set of mechanism, exists and adjusts difficulty, and location is inaccurate, the problem of easily damaging limit switch by pressure.
Summary of the invention
The purpose of this invention is to provide a kind of rotary buffer with limit switch for platform crane, the limit switch that has solved the Platform lifting devices itself existed in the prior art is adjusted difficulty, and location is inaccurate, the problem of easily damaging limit switch by pressure.
The technical solution adopted in the present invention is, a kind of rotary buffer with limit switch for platform crane is included on door frame to be provided with and otic placode one is installed and otic placode two is installed,
The lower edge of described installation otic placode one is provided with positioning plate, limit switch is installed in positioning plate, otic placode one is installed hinged by bearing pin and energy disperser, energy disperser inside is provided with stage clip, orienting sleeve, the orienting sleeve port of energy disperser is equipped with the energy disperser push rod, the inner of energy disperser push rod contacts with stage clip, and the outer end of energy disperser push rod is connected with energy disperser push rod pressure head; Energy disperser is provided with position-limited edge near the lower surface of bearing pin, on this position-limited edge, pressing plate is installed;
It is hinged with restorer that described installation otic placode two-way is crossed bearing pin two, and restorer inside is provided with stage clip two, orienting sleeve two, and orienting sleeve two ports are equipped with depression bar, and the inner of depression bar contacts with stage clip two, and the outer end of depression bar is hinged by bearing pin three and energy disperser.
Rotary buffer with limit switch for platform crane of the present invention is further characterized in that: the distance that described limit switch presses between head and pressing plate is greater than the 1mm-2mm of limit switch stroke.
The invention has the beneficial effects as follows, energy disperser is when jib 1 rotating down pressing, and for relative displacement does not occur the pressure head that guarantees energy disperser on jib, the push rod of the simultaneous buffering device that energy disperser is rotated down also bounces back.Because restorer is scalable rotatable again, therefore, when energy disperser is rotated down, restorer bounces back simultaneously and is rotated down.When jib reaches the maximum angle of setting, the position-limited edge of energy disperser has been close to positioning plate, and now limit switch is triggered by pressing plate, the automatically controlled warning simultaneously of cutting-off liquid pressure power.After jib returns, restorer sends back to initial position by energy disperser under the effect of spring.This is simple in structure, and operability, accuracy and safety all meet technical requirements.
The accompanying drawing explanation
The installation site schematic diagram of Fig. 1 rotary buffer with limit switch for platform crane of the present invention on Platform lifting devices;
Fig. 2 is structure and the principle of work schematic diagram of rotary buffer with limit switch for platform crane of the present invention.
In figure, 1. jib, 2. cushion fulcrum pressing plate, 3. energy disperser push rod pressure head, 4. energy disperser push rod, 5. orienting sleeve, 6. stage clip, 7. pressing plate, 8. bearing pin, 9. position-limited edge, 10. install otic placode one, 11. positioning plate, 12. limit switch, 13. install otic placode two, 14. bearing pin two, 15. stage clips two, 16. orienting sleeve two, 17. depression bars, 18. bearing pins three, 19. span winch, 20. door frames, 21. rotating type strip limit switch energy dispersers.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Fig. 1 is the installation site figure of rotary buffer with limit switch for platform crane of the present invention on Platform lifting devices, two cover rotating type strip limit switch energy dispersers 21 are installed on a set of Platform lifting devices, a set of with each the symmetrical installation of two limits near door frame 20 at jib 1, the limit switch that puts is wherein installed the hydraulic stop switch, but on another set of the mounting electrical limit switch.The jib 1 of Platform lifting devices can along the bottom bearing pin span winch 19 pull or transfer time rotation, span winch 19 drives jib 1 rotation by a set of assembly pulley.Door frame 20 is for supporting the luffing transmission device and energy disperser being installed.
The structural representation that Fig. 2 is rotating type strip limit switch energy disperser 21 of the present invention, be included on the mount pad of door frame 20 to be provided with and otic placode 1 be installed and otic placode 2 13 is installed, the lower edge that otic placode 1 is installed is provided with positioning plate 11, limit switch 12 is installed in positioning plate 11, otic placode 1 is installed hinged by bearing pin 8 and energy disperser, energy disperser inside is provided with stage clip 6, orienting sleeve 5, energy disperser orienting sleeve 5 ports are provided with energy disperser push rod 4, the inner of energy disperser push rod 4 contacts with stage clip 6, and the outer end of energy disperser push rod 4 is connected with energy disperser push rod pressure head 3; Energy disperser is provided with position-limited edge 9 near the lower surface of bearing pin 8, on this position-limited edge 9, pressing plate 7 is installed; Be provided with buffering fulcrum pressing plate 2 with the correspondence position of energy disperser push rod pressure head 3 on jib 1;
Otic placode 2 13 is installed hinged by bearing pin 2 14 and restorer, restorer inside is provided with stage clip 2 15, orienting sleeve 2 16, orienting sleeve 2 16 ports are provided with depression bar 17, and the inner of depression bar 17 contacts with stage clip 2 15, and the outer end of depression bar 17 is hinged by bearing pin 3 18 and energy disperser.
The distance " j " that limit switch 12 presses between head and pressing plate 7 is determined according to the stroke of limit switch, the limit switch stroke is generally 3～6mm, the stroke 1-2mm that " j " is greater than this limit switch gets final product, when the larger stroke of needs, limit switch 12 installation sites are moved and just can toward the direction away from bearing pin 8.Due at energy disperser toward the c direction rotation during to end position, positioning plate 11 has limited the rotation of energy disperser, so limit switch 12 can not continued to press down, thereby has protected limit switch 12 can not damaged by pressure.
Easy in order to describe, in following text, will comprise that an integral body of energy disperser pressure head 3, energy disperser push rod 4, energy disperser orienting sleeve 5, stage clip 6 compositions is referred to as energy disperser.The integral body that stage clip 2 15, orienting sleeve 2 16, depression bar 17 are formed is referred to as restorer.
The working process of apparatus of the present invention is: when jib 1 is tightened up by span winch 19, jib 1 is along the i direction rotation, and on jib, buffering fulcrum pressing plate 2 contacts with energy disperser pressure head 3.Jib 1 continues rotation along the i direction, and at this moment energy disperser push rod 4 supports and moves along the g direction by energy disperser orienting sleeve 5, and stage clip 6 provides a bearing force, and simultaneous buffering device main body is along bearing pin 8 along the c direction rotation.At this moment along e direction retraction, stage clip 2 15 is simultaneously compressed under the support of orienting sleeve 2 16 for the depression bar 17 of restorer, and whole restorer is along bearing pin 14 along a direction rotation.When energy disperser rotates to the position of setting, be that the position-limited edge 9 of energy disperser is when being mounted positioning plate 11 on otic placode 10 and blocking, whole energy disperser can not continue rotation, now limit switch 12 is triggered, hydraulic efficiency pressure system stops providing power, simultaneously, the electrical equipment limit switch of installing on another set of rotating type strip limit switch energy disperser also is triggered, and provides and reports to the police or stop providing power.At this moment energy disperser push rod 4 should have the surplus continued along g direction retraction, the vibrations that produce to reduce jib 1 cut.
When jib 1 is transferred by span winch 19, jib 1 is toward the contrarotation of i direction, and energy disperser is contrary toward the action of i direction rotation with action and the jib 1 of restorer.After on jib, buffering fulcrum pressing plate 2 disengages with energy disperser pressure head 3, the stage clip 2 15 supporting restorer depression bars 17 of restorer, at this moment allow the depression bar 17 of restorer just run to the end position of e direction.The bearing force of stage clip 2 15 when this end position should be able to overcome deadweight and and other friction of energy disperser.
Claims (1)
1. a rotary buffer with limit switch for platform crane is characterized in that: is included on door frame (20) to be provided with otic placode one (10) and installation otic placode two (13) is installed,
The lower edge of described installation otic placode one (10) is provided with positioning plate (11), limit switch (12) is installed in positioning plate (11), otic placode one (10) is installed hinged by bearing pin (8) and energy disperser, energy disperser inside is provided with stage clip (6), orienting sleeve (5), the orienting sleeve of energy disperser (5) port is equipped with energy disperser push rod (4), the inner of energy disperser push rod (4) contacts with stage clip (6), and the outer end of energy disperser push rod (4) is connected with energy disperser push rod pressure head (3); Energy disperser is provided with position-limited edge (9) near the lower surface of bearing pin (8), and pressing plate (7) is installed on this position-limited edge (9);
Described installation otic placode two (13) is hinged by bearing pin two (14) and restorer, restorer inside is provided with stage clip two (15), orienting sleeve two (16), orienting sleeve two (16) ports are equipped with depression bar (17), the inner of depression bar (17) contacts with stage clip two (15), and the outer end of depression bar (17) is hinged by bearing pin three (18) and energy disperser;
Described limit switch (12) press between head and pressing plate (7) apart from being greater than the 1mm-2mm of limit switch stroke.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102237395A CN102285601B (en) | 2011-08-05 | 2011-08-05 | Rotary buffer with limit switch for platform crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102237395A CN102285601B (en) | 2011-08-05 | 2011-08-05 | Rotary buffer with limit switch for platform crane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102285601A CN102285601A (en) | 2011-12-21 |
| CN102285601B true CN102285601B (en) | 2013-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102237395A Expired - Fee Related CN102285601B (en) | 2011-08-05 | 2011-08-05 | Rotary buffer with limit switch for platform crane |
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| CN (1) | CN102285601B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022002963A1 (en) * | 2020-06-29 | 2022-01-06 | Itrec B.V. | Heavy lift crane |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103641004A (en) * | 2013-11-25 | 2014-03-19 | 无锡起岸重工机械有限公司 | Trussed marine platform crane variable-amplitude limiting mechanism |
| CN103641005A (en) * | 2013-11-25 | 2014-03-19 | 无锡起岸重工机械有限公司 | Steel wire rope luffing electric arm rack anti-collision device |
| CN104929582A (en) * | 2015-06-05 | 2015-09-23 | 宝鸡石油机械有限责任公司 | Hydraulic cylinder buffering device for lifting drilling machine |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2297433Y (en) * | 1996-11-19 | 1998-11-18 | 田昆 | Safety limiting device for town crane |
| CN101993007B (en) * | 2009-08-15 | 2013-01-30 | 广西华力集团有限公司 | Pipe crane hoisting arm limiting device with buffer mechanism |
| CN201809097U (en) * | 2010-08-13 | 2011-04-27 | 宝鸡石油机械有限责任公司 | Control device for lower limited positions of marine platform crane |
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2011
- 2011-08-05 CN CN2011102237395A patent/CN102285601B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022002963A1 (en) * | 2020-06-29 | 2022-01-06 | Itrec B.V. | Heavy lift crane |
| NL2025943B1 (en) * | 2020-06-29 | 2022-03-04 | Itrec Bv | heavy lift crane |
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| Publication number | Publication date |
|---|---|
| CN102285601A (en) | 2011-12-21 |
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